Plasterer&#39;s trowel.



O. MASON & R. J. MOKISSICK.

PLASTERER'S TROWEL.

APPLIOAIION FILED 0(1T.17I 1910.

1,055,406. Patented Mar.11,1913.'

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UNITED STATES PATENT OFFICE.

CHARLES MASON AND ROBERT J. McKISSICK, OF DUGGER, INDIANA.

PLASTERERS TROWEL.

To all whom 215 may concern:

Be it known that we, CHARLES MAsoN and ROBERT J. MCKISSICK, citizens of the United States, residing at Dugger, in the county of Sullivan and State of Indiana, have invented certain new and useful Improvements in Plasterers Trowels, of which the following is a specification.

This invention relates to plasterers tools and has for its object the provision of a comparatively simple and thoroughly eili cient tool of this character, the blade of which is relatively thin and flexible so as to permit said blade to conform to the surface of the work when plastering cisterns, and other circular or arched structures.

Afurt-her object of the invention is to provide a plasterers tool, the handle of which may be adjusted vertically of the supporting shank to accommodate the hand of the operator and thus prevent injury to the knuckles when the tool is used for overhead Work.

A further object is to rovide means for securing the handle in di erent positions of vertical adjustment, and means for limiting the downward movement of said handle when the securing means is released.

A further object is to provide the handle of the tool with a longitudinal bolt or tang having an enlarged head formed with a slot for the reception of the shank of the tool, there being a washer interposed between the head of the bolt and the handle, said washer serving the dual function of a Wrench and bearing plate for the forefinger of the operator.

A still further object of the invention is generally to improve this class of devices to increase their utility, durability and eificiency.

For a full understanding of the invention reference is to be had to the following description and accompanying drawings in which:

Figure 1 is a perspective view of a plasterers tool or trowel constructed in accordance with our invention, showing in full lines the blade in normal position, and in dotted lines the ends of said blades flexed or bent upwardly. Fig. 2 is an enlarged longitudinal sectional view of the supporting handle. Fig. 3 is a perspective view of a portion of the blade, the several parts comprising the handle being detached from the Specification of Letters Patent. Patented luau 11, 1913,

Application filed October 17, 1910.

Serial No. 587,644.

shank and separated in order to more clearly illustrate the same. Fig. 4 is a perspective view showing the handle used in connection with a relatively rigid blade.

The improved plasterers tool forming the subject matter of the present invention comprises a flat relatively thin flexible blade 5, preferably rectangular in shape as shown and having its central portion reinforced and strengthened by a transverse foot or cleat 6. The cleat 6 is secured to the upper surface of the blade 5 at or near the center thereof, so as to permit the opposite ends of the blade to bend upwardly and thus conform to the surface of the work, when the tool is employed in the construction of cisterns and other circular or arched structures. Extending laterally from one side of the cleat 6 is an arm 7 terminating in a vertically disposed shank 8, the latter being preferably dovetailed in cross section and forming a support for a vertically adjustable handle 9. The handle 9 is provided with a longitudinally disposed bore 10 in which is seated a bolt or tang 11 having one end thereof threaded at 12, and its opposite end provided with an enlarged head 13 pierced by a vertically disposed recess 14 also preferably dovetailed in cross section and adapted to receive the shank 8. Secured to one end of the handle 9 is a plate or disk 15 having a laterally extending boss 16 which projects within the bore 10 of the handle and is provided with an interiorly threaded socket 17 adapted to receive the threaded end of the bolt 11, said plate being secured to the handle by bolts or similar fastening devices 18. Secured to the inner end of the handle 9 is a bearing ring 19 defining a central chamber 20 adapted to receive a circular boss or projection 21 formed on the inner face of the head 13 when said handle is rotated on the tang or bolt 11 to clamp the handle in adjusted position on the shank 8.'

Interposed between the shank 8 and bearing ring 19 is a plate or washer 22 having a square opening formed therein for the reception of the head 13 of the bolt, and provided with a depending extension 23, which serves the dual function of a bearing plate for contact with the forefinger of the operator, and also as a means for limiting the downward movement of the handle when the securing means is released. Thus it will be seen that by rotating the handle 9 on the bolt 11 the side wallsof the socket 14 may be released from engagement with the adjacent walls of the shank 8 so as to permit said handle to be adjusted vertically of the shank and thus prevent the knuckles of the operator from coming in contact with the cleat or foot 6 and lacerating or other- Wise injuring the hand when the tool is used for overhead work. The washer 22 also serves as a wrench forrotating the bolt. 11 and thus securing the handle thereon when said handle is removed from the shank, the inner face of the washer 22 forming a bearing surface for contact with the ring 19 when said handle is rotated to effect the adjustment thereof.

In Fig. 4: of the drawings a handle is shown in connection with a trowel having a relatively rigid blade 5, the shank 8 of the handle being formed with a longitudinally disposed cleat or foot 6 extending for the major portion of the blade as shown.

It will of course be understood that the trowels having either a flexible or rigid blade without departing from the spirit of the invention. 7

hat we claim is:

1. Aplasterers tool including a thin flexible blade, a transverse'cleat secured to the upper surface of the blade near the center thereof and provided with an upstanding shank, and a handle supported on the shank,

the blade between the opposite ends thereof cally of the shank, the blade between the opposite ends thereof and said cleat being free to bend upwardly in the direction of the handleto conform to the surface of the work.

In testimony whereof, we aflix our signaf tures in presence of two witnesses.

CHARLES MASON. [L.S.]

ROBERT J. MCKISSICK. [L.s.] Witnesses:

FREDRICK J. ELBREG,

A. E. EIsER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

